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<div class="subTitle">ar.com.hjg.pngj</div>
<h2 title="Interface IFilterWriteStrategy" class="title">Interface IFilterWriteStrategy</h2>
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<dt>All Known Implementing Classes:</dt>
<dd><a href="../../../../ar/com/hjg/pngj/FilterWriteStrategy.html" title="class in ar.com.hjg.pngj">FilterWriteStrategy</a></dd>
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<pre>public interface <span class="strong">IFilterWriteStrategy</span></pre>
<div class="block">Abstracts the strategy usdd by <a href="../../../../ar/com/hjg/pngj/PngWriter.html" title="class in ar.com.hjg.pngj"><code>PngWriter</code></a> to choose the PNG predictor
 filter for each line.
 <p>
 Only <a href="../../../../ar/com/hjg/pngj/PngWriter.html" title="class in ar.com.hjg.pngj"><code>PngWriter</code></a> should normally call these methods.</div>
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<td class="colFirst"><code><a href="../../../../ar/com/hjg/pngj/FilterType.html" title="enum in ar.com.hjg.pngj">FilterType</a></code></td>
<td class="colLast"><code><strong><a href="../../../../ar/com/hjg/pngj/IFilterWriteStrategy.html#preferedType(int)">preferedType</a></strong>(int&nbsp;rown)</code>
<div class="block">Returns which (actual) filter is recommended to use for this row.</div>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../ar/com/hjg/pngj/IFilterWriteStrategy.html#reportResultsForFilter(int, ar.com.hjg.pngj.FilterType, byte[], boolean)">reportResultsForFilter</a></strong>(int&nbsp;rown,
                      <a href="../../../../ar/com/hjg/pngj/FilterType.html" title="enum in ar.com.hjg.pngj">FilterType</a>&nbsp;type,
                      byte[]&nbsp;rowbfilter,
                      boolean&nbsp;tentative)</code>
<div class="block">Reports the filtered row, so that the strategy can compute statistics.</div>
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<td class="colFirst"><code><a href="http://docs.oracle.com/javase/1.5.0/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../ar/com/hjg/pngj/FilterType.html" title="enum in ar.com.hjg.pngj">FilterType</a>&gt;</code></td>
<td class="colLast"><code><strong><a href="../../../../ar/com/hjg/pngj/IFilterWriteStrategy.html#shouldTest(int)">shouldTest</a></strong>(int&nbsp;rown)</code>
<div class="block">Returns which filter types should be tested (tried) for this row.</div>
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<h4>shouldTest</h4>
<pre><a href="http://docs.oracle.com/javase/1.5.0/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../ar/com/hjg/pngj/FilterType.html" title="enum in ar.com.hjg.pngj">FilterType</a>&gt;&nbsp;shouldTest(int&nbsp;rown)</pre>
<div class="block">Returns which filter types should be tested (tried) for this row. Empty
 if we should not test.</div>
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<h4>reportResultsForFilter</h4>
<pre>void&nbsp;reportResultsForFilter(int&nbsp;rown,
                          <a href="../../../../ar/com/hjg/pngj/FilterType.html" title="enum in ar.com.hjg.pngj">FilterType</a>&nbsp;type,
                          byte[]&nbsp;rowbfilter,
                          boolean&nbsp;tentative)</pre>
<div class="block">Reports the filtered row, so that the strategy can compute statistics.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>rown</code> - Row number</dd><dd><code>type</code> - To which (real) filter this result corresponds</dd><dd><code>rowbfilter</code> - Filtered row (first byte is filter type)</dd><dd><code>tentative</code> - If true, this signals that this is a test/try; if false, we
            confirm that this row is to be written</dd></dl>
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<h4>preferedType</h4>
<pre><a href="../../../../ar/com/hjg/pngj/FilterType.html" title="enum in ar.com.hjg.pngj">FilterType</a>&nbsp;preferedType(int&nbsp;rown)</pre>
<div class="block">Returns which (actual) filter is recommended to use for this row.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>rown</code> - </dd>
<dt><span class="strong">Returns:</span></dt><dd>One <a href="../../../../ar/com/hjg/pngj/FilterType.html" title="enum in ar.com.hjg.pngj"><code>FilterType</code></a></dd></dl>
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